D7321 is the CDT code for alveoloplasty performed at a site where no extractions are done at the same appointment. The procedure involves surgical contouring or smoothing of the alveolar bone in an area that is already edentulous before the current visit. It covers one to three tooth or tooth-space positions within a quadrant. A separate code covers four or more teeth in the same quadrant.
Get help with D7321 claims →Last updated June 2026 · Reviewed by the PracticeAlpha billing team
D7321 is most commonly used when an edentulous ridge needs to be surgically contoured before denture fabrication. Bony prominences, sharp ridges, or undercut areas left after previous healing can interfere with denture fabrication or cause chronic tissue irritation. If no extractions are performed at this appointment, D7321 is the appropriate code regardless of how long ago the original extractions took place.
When extraction sites have healed but left behind sharp bony spicules, exostoses, or irregular contours, D7321 covers the surgical smoothing of those areas. A patient who had teeth extracted at a previous appointment and returns weeks or months later specifically for ridge preparation would be billed with D7321, not D7310.
D7321 covers one to three tooth positions within a quadrant. If the alveoloplasty covers four or more tooth spaces within the same quadrant in the same appointment without concurrent extractions, the appropriate code changes to a higher-count code. Document the specific positions to support the code selected.
D7321 is specifically for alveoloplasty not in conjunction with extractions. If any extractions were performed at the same appointment in the same or adjacent area, D7310 should be considered instead. Using D7321 when extractions occurred on the same date is a common coding error that leads to denial or audit.
The clinical note must establish that the area treated was already edentulous before the current visit. If the record does not clearly show the site was edentulous before the appointment, the payer cannot verify that D7321 applies rather than D7310 or a routine adjustment code.
Some plans consider ridge preparation to be included in the fee for a denture that is being delivered at or near the same time. When alveoloplasty and denture delivery are close in date, a narrative explaining that the ridge recontouring was a separate, distinct surgical procedure is often required to avoid bundling.
A periapical or panoramic radiograph showing the area treated before surgery supports the claim and demonstrates the clinical need for the procedure. Claims lacking any radiographic support for the bony irregularity are more likely to receive a request for additional information or an outright denial.
Note the date of prior extractions if known, or indicate that the area was clinically and radiographically edentulous before the current surgical visit. This is the defining factor that distinguishes D7321 from D7310.
Document the specific tooth positions (by number or universal system) and the quadrant treated. Confirm the number of spaces is within the one-to-three range for D7321.
Record what was found (bony spicule, sharp ridge, undercut, exostosis) and the surgical technique used to contour the area. Include pre- and post-procedure measurements or clinical descriptions where relevant.
A periapical or panoramic radiograph taken before the alveoloplasty helps establish the clinical necessity of the procedure and supports the specific area treated.
Oral surgery claims often hinge on whether extractions were on the same date. We catch those coding distinctions before claims go out.
Learn about our billing servicesD7321 is the CDT code for alveoloplasty not performed in conjunction with extractions, covering one to three tooth or tooth-space positions per quadrant. The procedure involves surgical recontouring of alveolar bone at a site that was already edentulous before the current appointment.
D7310 is for alveoloplasty performed on the same day as four or more extractions per quadrant. D7321 is for alveoloplasty at a site where the teeth were already absent before the current visit and no extractions are performed at the same appointment.
No. D7321 is specifically for alveoloplasty not in conjunction with extractions. If extractions are performed at the same appointment in the same area, the appropriate alveoloplasty code is D7310 or D7311, depending on the number of teeth.
Most commonly used when preparing an already-edentulous ridge for denture fabrication, or when smoothing bony irregularities that developed after previous extractions have healed.
Common reasons: extractions were performed at the same appointment (use D7310 or D7311 instead), site not documented as previously edentulous, claim bundled into concurrent denture delivery, or missing radiographic documentation of the bony irregularity.
Confirmation that the site was edentulous before the visit, specific tooth positions and quadrant, a description of the bony irregularity and surgical technique, and a pre-operative periapical or panoramic radiograph of the area.
Search all CDT codes in our dental coding guide.